enable JWT-based user impersonation/role-switching #212
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This PR allow users to supply a JWT token as an
Authorization
header when making requests.If configured to allow this,
pg_tileserv
will check the signature on the token, look in a specific field of the claims to extract a database role name, and switch to that role before running database queries. If no token is provided, it will switch to a designated anonymous_user role.This mechanism allows access to certain tables to be restricted to authorized users.