private static IIdentityServerBuilder RegisterIdentityServerStoresWithDbContexts
<TConfigurationDbContext, TPersistedGrantDbContext>
(IIdentityServerBuilder builder, IConfiguration configuration, ILogger logger,
Action <ConfigurationStoreOptions> configurationStoreOptions, Action <OperationalStoreOptions> operationalStoreOptions)
where TPersistedGrantDbContext : DbContext, IPersistedGrantDbContext
where TConfigurationDbContext : DbContext, IConfigurationDbContext
{
// Config DB from existing connection
builder.AddConfigurationStore <TConfigurationDbContext>(configurationStoreOptions);
// Operational DB from existing connection
builder.AddOperationalStore <TPersistedGrantDbContext>(operationalStoreOptions);
builder.AddCustomSigningCredential(configuration, logger);
builder.AddCustomValidationKey(configuration, logger);
return(builder);
}