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Most modes are supported using the interfaces described in Plugin Requirements, above. However, Authenticate mode requires OIS Plugins to implement an additional interface. (Plugins should use this interface to support Authenticate mode, and not the general Enrollment Flow Plugin interface, since this interface will automatically handle configuration checking and plugin ordering.)
The Enrollment Flow will hand off control during the selectOrgIdentity step to the entry point foo_source/foo_source_co_petitions/selectOrgIdentityAuthenticate/#/oisid:## (where # is the relevant CO Petition ID, and ## is the Org Identity Source ID).
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