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It resolves the session, calls ",[439,609,444],{},", captures timing into ",[439,612,613],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[616,617,85],"h2",{"id":618},"options",[436,620,621,622,629],{},"Inherits all ",[623,624,626,628],"a",{"href":625},"\u002Flogging\u002Fbetter-auth\u002Fidentify-user#options",[439,627,444],{}," options",", plus:",[631,632,633,652],"table",{},[634,635,636],"thead",{},[637,638,639,643,646,649],"tr",{},[640,641,642],"th",{},"Option",[640,644,645],{},"Type",[640,647,648],{},"Default",[640,650,651],{},"Description",[653,654,655,676,695,714],"tbody",{},[637,656,657,663,668,673],{},[658,659,660],"td",{},[439,661,662],{},"exclude",[658,664,665],{},[439,666,667],{},"string[]",[658,669,670],{},[439,671,672],{},"['\u002Fapi\u002Fauth\u002F**']",[658,674,675],{},"Route patterns to skip (glob).",[637,677,678,683,687,692],{},[658,679,680],{},[439,681,682],{},"include",[658,684,685],{},[439,686,667],{},[658,688,689],{},[439,690,691],{},"undefined",[658,693,694],{},"If set, only matching routes are resolved.",[637,696,697,702,707,711],{},[658,698,699],{},[439,700,701],{},"onIdentify",[658,703,704],{},[439,705,706],{},"(log, session) => void",[658,708,709],{},[439,710,691],{},[658,712,713],{},"Called after successful identification.",[637,715,716,721,726,730],{},[658,717,718],{},[439,719,720],{},"onAnonymous",[658,722,723],{},[439,724,725],{},"(log) => void",[658,727,728],{},[439,729,691],{},[658,731,732],{},"Called when no session is found.",[616,734,736],{"id":735},"route-filtering","Route Filtering",[436,738,739],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[447,741,743],{"className":449,"code":742,"language":452,"meta":453,"style":453},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[439,744,745,761,770,785,798,812,819],{"__ignoreMap":453},[457,746,747,749,751,753,755,757,759],{"class":459,"line":460},[457,748,502],{"class":501},[457,750,505],{"class":471},[457,752,508],{"class":467},[457,754,472],{"class":511},[457,756,514],{"class":471},[457,758,517],{"class":467},[457,760,520],{"class":467},[457,762,763,765,767],{"class":459,"line":491},[457,764,527],{"class":526},[457,766,530],{"class":467},[457,768,769],{"class":471}," [\n",[457,771,772,775,777,779,781],{"class":459,"line":498},[457,773,774],{"class":467},"    '",[457,776,539],{"class":484},[457,778,536],{"class":467},[457,780,517],{"class":467},[457,782,784],{"class":783},"sHwdD","     \u002F\u002F Better Auth itself\n",[457,786,787,789,791,793,795],{"class":459,"line":523},[457,788,774],{"class":467},[457,790,548],{"class":484},[457,792,536],{"class":467},[457,794,517],{"class":467},[457,796,797],{"class":783},"   \u002F\u002F Public endpoints\n",[457,799,800,802,805,807,809],{"class":459,"line":559},[457,801,774],{"class":467},[457,803,804],{"class":484},"\u002Fapi\u002Fhealth",[457,806,536],{"class":467},[457,808,517],{"class":467},[457,810,811],{"class":783},"      \u002F\u002F Health checks\n",[457,813,814,817],{"class":459,"line":580},[457,815,816],{"class":471},"  ]",[457,818,556],{"class":467},[457,820,821,823],{"class":459,"line":594},[457,822,597],{"class":467},[457,824,600],{"class":471},[436,826,827],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[447,829,831],{"className":449,"code":830,"language":452,"meta":453,"style":453},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[439,832,833,849,877],{"__ignoreMap":453},[457,834,835,837,839,841,843,845,847],{"class":459,"line":460},[457,836,502],{"class":501},[457,838,505],{"class":471},[457,840,508],{"class":467},[457,842,472],{"class":511},[457,844,514],{"class":471},[457,846,517],{"class":467},[457,848,520],{"class":467},[457,850,851,853,855,857,859,862,864,866,868,871,873,875],{"class":459,"line":491},[457,852,562],{"class":526},[457,854,530],{"class":467},[457,856,533],{"class":471},[457,858,536],{"class":467},[457,860,861],{"class":484},"\u002Fapi\u002Fdashboard\u002F**",[457,863,536],{"class":467},[457,865,517],{"class":467},[457,867,481],{"class":467},[457,869,870],{"class":484},"\u002Fapi\u002Faccount\u002F**",[457,872,536],{"class":467},[457,874,553],{"class":471},[457,876,556],{"class":467},[457,878,879,881],{"class":459,"line":498},[457,880,597],{"class":467},[457,882,600],{"class":471},[436,884,885,887,888,890,891,894,895,898,899,901,902,904],{},[439,886,682],{}," and ",[439,889,662],{}," use glob patterns (",[439,892,893],{},"*",", ",[439,896,897],{},"**","). Provide both if you need granular control — ",[439,900,662],{}," wins over ",[439,903,682],{},".",[616,906,908],{"id":907},"lifecycle-hooks","Lifecycle Hooks",[436,910,911,912,914],{},"Use ",[439,913,701],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[447,916,918],{"className":449,"code":917,"filename":451,"language":452,"meta":453,"style":453},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[439,919,920,936,963,999,1026,1031,1036,1053,1078,1083],{"__ignoreMap":453},[457,921,922,924,926,928,930,932,934],{"class":459,"line":460},[457,923,502],{"class":501},[457,925,505],{"class":471},[457,927,508],{"class":467},[457,929,472],{"class":511},[457,931,514],{"class":471},[457,933,517],{"class":467},[457,935,520],{"class":467},[457,937,938,941,943,946,950,952,955,958,961],{"class":459,"line":491},[457,939,940],{"class":511},"  onIdentify",[457,942,530],{"class":467},[457,944,945],{"class":467}," (",[457,947,949],{"class":948},"sHdIc","log",[457,951,517],{"class":467},[457,953,954],{"class":948}," session",[457,956,957],{"class":467},")",[457,959,960],{"class":501}," =>",[457,962,520],{"class":467},[457,964,965,968,970,973,975,978,980,983,986,988,991,993,996],{"class":459,"line":498},[457,966,967],{"class":463},"    if",[457,969,945],{"class":526},[457,971,972],{"class":471},"session",[457,974,904],{"class":467},[457,976,977],{"class":471},"user",[457,979,904],{"class":467},[457,981,982],{"class":471},"plan",[457,984,985],{"class":467}," ===",[457,987,481],{"class":467},[457,989,990],{"class":484},"enterprise",[457,992,536],{"class":467},[457,994,995],{"class":526},") ",[457,997,998],{"class":467},"{\n",[457,1000,1001,1004,1006,1009,1012,1015,1018,1020,1022,1024],{"class":459,"line":523},[457,1002,1003],{"class":471},"      log",[457,1005,904],{"class":467},[457,1007,1008],{"class":511},"set",[457,1010,1011],{"class":526},"(",[457,1013,1014],{"class":467},"{",[457,1016,1017],{"class":526}," _forceKeep",[457,1019,530],{"class":467},[457,1021,589],{"class":588},[457,1023,475],{"class":467},[457,1025,600],{"class":526},[457,1027,1028],{"class":459,"line":559},[457,1029,1030],{"class":467},"    }\n",[457,1032,1033],{"class":459,"line":580},[457,1034,1035],{"class":467},"  },\n",[457,1037,1038,1041,1043,1045,1047,1049,1051],{"class":459,"line":594},[457,1039,1040],{"class":511},"  onAnonymous",[457,1042,530],{"class":467},[457,1044,945],{"class":467},[457,1046,949],{"class":948},[457,1048,957],{"class":467},[457,1050,960],{"class":501},[457,1052,520],{"class":467},[457,1054,1056,1059,1061,1063,1065,1067,1070,1072,1074,1076],{"class":459,"line":1055},8,[457,1057,1058],{"class":471},"    log",[457,1060,904],{"class":467},[457,1062,1008],{"class":511},[457,1064,1011],{"class":526},[457,1066,1014],{"class":467},[457,1068,1069],{"class":526}," anonymous",[457,1071,530],{"class":467},[457,1073,589],{"class":588},[457,1075,475],{"class":467},[457,1077,600],{"class":526},[457,1079,1081],{"class":459,"line":1080},9,[457,1082,1035],{"class":467},[457,1084,1086,1088],{"class":459,"line":1085},10,[457,1087,597],{"class":467},[457,1089,600],{"class":471},[436,1091,1092,1093,1095,1096,1098,1099,1101],{},"Hooks fire after the session is resolved and ",[439,1094,444],{}," has set its fields. They run on every request that passes the ",[439,1097,682],{},"\u002F",[439,1100,662],{}," filter, so keep them fast and side-effect-free.",[1103,1104,1105,1110],"tip",{},[436,1106,1107,1108,530],{},"Common patterns for ",[439,1109,701],{},[1111,1112,1113,1117,1120],"ul",{},[1114,1115,1116],"li",{},"Force-keep audit logs for admins or high-value plans.",[1114,1118,1119],{},"Tag the request with feature flags or tenant info loaded from the session.",[1114,1121,1122],{},"Increment a per-user counter for billing.",[616,1124,1126],{"id":1125},"error-handling","Error Handling",[436,1128,1129,1130,1133,1134,887,1136,1139],{},"The middleware catches every error from ",[439,1131,1132],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[439,1135,613],{},[439,1137,1138],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1141,1142,1143],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":453,"searchDepth":491,"depth":491,"links":1145},[1146,1147,1148,1149],{"id":618,"depth":491,"text":85},{"id":735,"depth":491,"text":736},{"id":907,"depth":491,"text":908},{"id":1125,"depth":491,"text":1126},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1153,1156],{"label":109,"icon":112,"to":110,"color":1154,"variant":1155},"neutral","subtle",{"label":123,"icon":126,"to":124,"color":1154,"variant":1155},{},{"title":114,"icon":117},{"title":431,"description":1150},"ZixjaO8WGr0DIrrPIzupQI4fZZLVn2bM3EBBAoqYgdg",[1162,1164],{"title":109,"path":110,"stem":111,"description":1163,"icon":112,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":119,"path":120,"stem":121,"description":1165,"icon":69,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1778336623318]