fix: cannot change user password

[motorina0]

Summary

Check for username before allowing password change

Steps:

• create a new account
• go to Account page an try to change the password

Actual Result:

• an error message is displayed: [{'loc': ('body', 'username'), 'msg': 'field required', 'type': 'value_error.missing'}]

Expected Result:

• a nice message is displayed asking the user to set an username first
• username/password login is not possible without a username

Workaround:

• set a username before changing the password

Cause:

• regression bug from "Install wizard on first launch" feature

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (22ea83e) 51.89% compared to head (d0c837e) 59.22%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #2239      +/-   ##
==========================================
+ Coverage   51.89%   59.22%   +7.32%     
==========================================
  Files          60       60              
  Lines        9018     9018              
==========================================
+ Hits         4680     5341     +661     
+ Misses       4338     3677     -661     

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