public async Task <IActionResult> Post([FromBody] Dictionary <string, string> student)
        {
            if (Validation.IsAnyInputObjectDataNotSpecified(new List <object> {
                student.ContainsKey("FirstName") ? student["FirstName"] : null,
                student.ContainsKey("LastName") ? student["LastName"] : null, student.ContainsKey("PhoneNumber") ?
                student["PhoneNumber"] : null, student.ContainsKey("Email") ? student["Email"] : null,
                student.ContainsKey("Github") ? student["Github"] : null
            }))
            {
                return(BadRequest("Error: all student input data must be specified"));
            }

            if (!Validation.IsValidFirstOrLastName(student["FirstName"]))
            {
                return(BadRequest("Error: first name is incorrect"));
            }

            if (!Validation.IsValidFirstOrLastName(student["LastName"]))
            {
                return(BadRequest("Error: last name is incorrect"));
            }

            if (!Validation.IsValidPhoneNumber(student["PhoneNumber"]))
            {
                return(BadRequest("Error: phone number is incorrect"));
            }

            if (!Validation.IsValidEmailAddress(student["Email"]))
            {
                return(BadRequest("Error: email address is incorrect"));
            }

            var resultStudent = new Student
            {
                FirstName   = student["FirstName"],
                LastName    = student["LastName"],
                PhoneNumber = student["PhoneNumber"],
                Email       = student["Email"],
                Github      = student["Github"]
            };

            using (var connection = new SqlConnection(Configuration.GetConnectionString("DefaultConnection")))
            {
                try
                {
                    connection.Open();

                    await StudentsRepository.CreateStudentAsync(connection, resultStudent);
                }
                catch (Exception ex)
                {
                    return(BadRequest(ex.Message));
                }
            }

            return(Ok(resultStudent));
        }