Creating New HTTP Client in Keycloak EntityResolutionService

[imdominicreed]

On every call to Keycloak's implementation of EntityResolutionService (ERS), a new HTTP Client is created. This is specifically when create a new gocloak.Gocloak (reference to code).

When a massive amount of decrypts are done, this can create connection errors, due to lack of connection pooling. For me, when this happens, ERS returns an error specifically connection reset by peer.

A quick fix, I ran was just using a global resty.Client and using it in gocloak.Gocloak on creation.