Auth reports 'auth/internal-error' when 'auth/user-not-found' expected

[wtpalexander]

[READ] Step 1: Are you in the right place?

• For issues related to the code in this repository file a Github issue.
• If the issue pertains to Cloud Firestore, read the instructions in the "Firestore issue"
  template.
• For general technical questions, post a question on StackOverflow
  with the firebase tag.
• For general Firebase discussion, use the firebase-talk
  google group.
• For help troubleshooting your application that does not fall under one
  of the above categories, reach out to the personalized
  Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Operating System version: Mac OSX 11.4
• Firebase SDK version: 9.2.0
• Firebase Product: Auth
• Node.js version: v14.15.4
• NPM version: 6.14.10

[REQUIRED] Step 3: Describe the problem

Running a firebase function on emulators, using the Admin SDK to generate a password reset email calling await admin.auth().generatePasswordResetLink(email, actionCodeSettings) the error returned when the email address doesn't match any users in the database causes an internal ('auth/internal-error') error rather than returning the expected 'auth/user-not-found'.

Steps to reproduce:

Trigger a function running using the emulator, that generates the password reset link for an account that doesn't exist.

Relevant Code:

Console logs when the error is reported:

>  FirebaseAuthError: An internal error has occurred. Raw server response: "{"error":{"code":400,"message":"EMAIL_NOT_FOUND","errors":[{"message":"EMAIL_NOT_FOUND","reason":"invalid","domain":"global"}]}}"
>      at FirebaseAuthError.FirebaseError [as constructor] (/Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-admin/lib/utils/error.js:44:28)
>      at FirebaseAuthError.PrefixedFirebaseError [as constructor] (/Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-admin/lib/utils/error.js:90:28)
>      at new FirebaseAuthError (/Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-admin/lib/utils/error.js:149:16)
>      at Function.FirebaseAuthError.fromServerError (/Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-admin/lib/utils/error.js:188:16)
>      at /Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-admin/lib/auth/auth-api-request.js:1526:49
>      at processTicksAndRejections (internal/process/task_queues.js:97:5)
>      at async /Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/user-management.js:72:26
>      at async func (/Users/wtpalexander/APPSTRM Dev/Progression/Firebase/functions/node_modules/firebase-functions/lib/providers/https.js:273:26) {
>    errorInfo: {
>      code: 'auth/internal-error',
>      message: 'An internal error has occurred. Raw server response: "{"error":{"code":400,"message":"EMAIL_NOT_FOUND","errors":[{"message":"EMAIL_NOT_FOUND","reason":"invalid","domain":"global"}]}}"'
>    },
>    codePrefix: 'auth'
>  }

[hiranya911]

Fixed in #1246. Available in releases v9.8.0 and up.