Support usage without Azure AD app registration

[olljanat]

Not all organizations are interested to create app registration on company level that single user user can use this tool.

This pull requests sets defaults on same way than CLI for Microsoft 365 is using which looks to be pre-approved by Microsoft so users can use this tool to export their own Teams data without need to request permissions from their Azure AD admin.

NOTE! I don't have that that application registration so would be good idea to test by someone who have that I didn't broke that version.