fix: Enabling the ability to log in with a username consisting of 2 characters (backport from palm branch)

[Lunyachek]

This is backport from this PR - #1072

Description

For now, we have the ability to register with a username consisting of 2 characters. However, when we try to log in with this username, we receive an error indicating that the 'username should be at least 3 characters.' In this PR, we fix this bug.

Before

2023-10-11.17.32.42.mov

2023-10-11.17.40.09.mov

After

2023-10-11.17.41.42.mov

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e3d9638) 87.47% compared to head (8ac3cfe) 87.47%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1073   +/-   ##
=======================================
  Coverage   87.47%   87.47%           
=======================================
  Files         124      124           
  Lines        2251     2251           
  Branches      629      629           
=======================================
  Hits         1969     1969           
  Misses        273      273           
  Partials        9        9           

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[mphilbrick211]

Hi @openedx/vanguards! Would someone be able to review/ merge this along with the backports #1072 and #1098 ? Thanks!

[zainab-amir]

@mphilbrick211 I will have someone from the team pick this.

[attiyaIshaque]

Looks good to me. 👍

[attiyaIshaque]

@Lunyachek Can you please rebase your branch with the latest code?

[mphilbrick211]

@Lunyachek - flagging this for you!

[Lunyachek]

attiyaIshaque

Sorry for the delay. Rebased!

[mphilbrick211]

Hi @attiyaIshaque! Are you able to merge this for us?

[attiyaIshaque]

@Lunyachek Can you please rebase your branch with the latest code? I have missed your notification.Thanks

[Lunyachek]

@Lunyachek Can you please rebase your branch with the latest code? I have missed your notification.Thanks

Done

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