if (this.keyField === 'username') {
                    user = this.mergeUsersDistinctServices
                        ? await Users.findOneByUsernameIgnoringCase(serviceData.username)
                        : await Users.findOneByUsernameAndServiceNameIgnoringCase(serviceData.username, serviceData.id, serviceName);
                } else if (this.keyField === 'email') {