Change doc for authorization - user to credentials

[FlorianJacta]

Change on this page: https://docs.taipy.io/en/latest/userman/advanced_features/auth/authorization/#basic-example

user = login("<username>", "<password>") to credential= login("<username>", "<password>")

This created comprehension issues.

Target branches:

• release/4.0
• release/3.1
• develop

[jrobinAV]

Please check the concerned branches:

• develop
• release/4.0
• release/3.1
• release/3.0

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