Make OAuth library's AuthStyle configurable#271

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Obirah wants to merge 4 commits intothomseddon:masterfrom Obirah:feature/259-make-auth-style-configurable

+124-14

Commits on Jul 21, 2021

Implements configurable authentication style for OIDC and generic OAuth providers.
Thomas Krause
committed

Commits on Jul 23, 2021

Fixes formatting.
Thomas Krause
committed
Removed redundancies.
Thomas Krause
committed
Updated the documentation.
Thomas Krause
committed