chore: let abandoned SSO users recover their accounts

[Dschoordsch]

When a user was created via SSO but now that SSO is not set up anymore, they lose access to their accounts.
Just removing SAML from an organization is not the same as a data deletion request and should also not be treated as a way to lock out users, so let those users recover their accounts by signing up a different way.

Description

Fixes/Partially Fixes #[issue number]
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Demo

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