feat: return email in signup response (#1217)

* check email in signup response
Co-authored-by: Rafaela Maria Soares da Silva <rsoaresd@redhat.com>

Author: mfrancisc

test/e2e/parallel/registration_service_test.go

@@ -489,6 +489,7 @@ func TestSignupOK(t *testing.T) {
 				"username":      userSignup.Spec.IdentityClaims.PreferredUsername,
 				"givenName":     userSignup.Spec.IdentityClaims.GivenName,
 				"familyName":    userSignup.Spec.IdentityClaims.FamilyName,
+				"email":         emailAddress,
 				"userID":        "123",
 				"accountID":     "456",
 				"accountNumber": "789",
@@ -1036,7 +1037,7 @@ func signupHasExpectedClaims(claims map[string]string) func(c *GetSignupClient)
 	return func(c *GetSignupClient) {
 		for expectedClaim, expectedClaimValue := range claims {
 			actualClaimValue, claimFound := c.responseBody[expectedClaim]
-			require.True(c.t, claimFound, "unable to find expected claim [%s]. Claims found %v", expectedClaim, claims)
+			require.True(c.t, claimFound, "unable to find expected claim [%s]. Claims found %v", expectedClaim, c.responseBody)
 			require.Equal(c.t, expectedClaimValue, actualClaimValue, "expected claim value [%s] doesn't match actual claim value [%s]", expectedClaimValue, actualClaimValue)
 		}
 	}