public async Task AddToMedicalRoleAsync()

in src/Services/User/User.Infrastructure/Identity/IdentityService.cs [151:213]
47 lines of code
5 McCabe index (conditional complexity)

        public async Task<Result> AddToMedicalRoleAsync(string userToken, string healthSecurityId)
        {
            var medicalRoleName = Roles.Medical.ToString("G");

            logger.LogInformation("Start assignment of user with token {userToken} to {medicalRole} role.",
                userToken,
                medicalRoleName);

            (Result searchResult, ApplicationUser user) = await FindUserByTokenAsync(userToken);

            if (!searchResult.Succeeded)
            {
                logger.LogError("Error on assignment user with token {userToken}. Errors: {@message}",
                    userToken,
                    searchResult.Errors);

                return searchResult;
            }

            if (await userManager.IsInRoleAsync(user, medicalRoleName))
            {
                logger.LogInformation("User with token {userToken} already assignment to {medicalRole} role.",
                    userToken,
                    medicalRoleName);

                return Result.Success();
            }

            if (!medicalRegistrationRepository.TryRegistration(healthSecurityId))
            {
                Result result = Result.Failure(new InnerError(ErrorTarget.InvalidHealthSecurityId,
                    "Health security id is already taken or expired."));

                logger.LogWarning("Unsuccessful result on validation of the security Id {healthSecurityId}. Errors: {@message}",
                    healthSecurityId,
                    result.Errors);

                return result;
            }

            IdentityResult roleAssignmentResult = await userManager.AddToRoleAsync(user, medicalRoleName);

            if (!roleAssignmentResult.Succeeded)
            {
                medicalRegistrationRepository.RollBackRegistration(healthSecurityId);

                Result result = roleAssignmentResult.ToApplicationResult();

                logger.LogError("Error on assignment user with token {userToken} to {medicalRole} role. Errors: {@message}",
                    userToken,
                    medicalRoleName,
                    result.Errors);

                return result;
            }

            logger.LogInformation("Successfully assigned {userName} user with token {userToken} to {medicalRole} role..",
                user.UserName,
                userToken,
                medicalRoleName);

            return Result.Success();
        }