The most common error page is the 401 Not Authorized error, which occurs when your identity doesn't have permissions to enter an organization.
Common reasons for the error include:
Your identity isn't a member of the organization.
Your identity has an invalid or missing license assignment.
For more info refer to : https://docs.microsoft.com/en-in/azure/devops/user-guide/troubleshoot-connection?view=azure-devops
You can use -Credential parameter, and DPAPI to login.
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