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Problem
The system does not recognize the username entered during login.
Symptoms
"Username not found" or similar error.
User is confident the username is correct.
Error occurs even though the account is known to exist.
Possible Causes
Username changed at some point without the user's knowledge.
Login expects an email address instead of a separate username, or vice versa.
Typo or extra spaces in the entered username.
Account created under a different username format (e.g., full email vs. short handle).
Resolution
Step 1
Try logging in with the full email address instead of a short username, or vice versa.
Step 2
Check for extra spaces or autocorrect changes in the entered text.
Step 3
Confirm whether the username was ever changed by an administrator.
Step 4
Use the "forgot username" recovery option if available.
Step 5
Contact support to confirm the correct login identifier for the account.
Prevention
Keep a secure record of the exact username or login identifier used.
Avoid changing usernames unless necessary.
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