I want my phpBB instance to replace existing built-in authorisation with OAUTH2.
I managed OAUTH2 to authorise, but phpBB proposes linking existing accounts to the data provided by OAUTH2 - I want to force OAUTH2 without asking users to link accounts. OAUTH2 server has a copy of all accounts already.
Any suggestions how to achieve it - best with code examples?
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find me somewhere in SW London, 100 meters from Thames River