Enatega Customer Application: Phone number already associated error shown during login with email

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Describe the bug
When a user logs in using their email address and proceeds to verify their phone number, the app displays an error message stating that the phone number is already associated with another account — even though it's the correct number linked to the same user.

🔄 Steps to Reproduce:

Open the app and choose to log in with email.
Enter a valid email and complete login.
When prompted, enter your phone number for verification.
Observe the error message.
Expected behavior
The phone number should be verified successfully if it belongs to the same user account.

Start by reproducing the email-login flow and phone-number verification described in the issue, then trace the authentication handling that reports the association error. Done means a phone number already linked to the same user verifies successfully, while numbers belonging to another account still produce the appropriate error.

Written by the indexing model from the issue text.