bug #683 add ChainUserProvider (Gemorroj)
bug #683 add ChainUserProvider (Gemorroj)

This PR was merged into the 2.x-dev branch.

Discussion
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add ChainUserProvider

Fixes #615
Fixes #754

Commits
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63b3941 add ChainUserProvider

lexik/LexikJWTAuthenticationBundle,chalasr/LexikJWTAuthenticationBundle