Refers to #14984
Currently, password validation is done backend side and is not explicit
enough so it can be painful to create first users.
We'd like to make this validation easier - but also duplicate it
frontend side to make it smoother.
Flows involved :
- First user set password
- New user set password
- Change password
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Co-authored-by: BrunoQuaresma <bruno_nonato_quaresma@hotmail.com>
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