Small changes in credentials (esp. relating to Azure)

[almahmoud]

Given that some "invalid credentials" errors could appear when the authentication parts of the provided credentials are correct but other fields are not complying with restrictions (example: using invalid characters in the Resource Group name for Azure, or using an already existing Storage Account given that they have to be unique across ALL Azure accounts), displaying the actual error message when credentials cannot be verified can be very helpful for users trying to figure out what parts they need to change. The other changes are minor changes to the Azure credentials to better guide users

[almahmoud]

Examples of errors with details:

Handled

Raw