// Add coach from a team
/// <summary>
/// Add coach from a team.
/// </summary>
/// <returns>
/// Nothing
/// </returns>
public void AddCoachToATeam(int teamId, int coachId)
{
Team team = GetTeamById(teamId);
Coach coach = coachService.GetCoachById(coachId);
if (team.Coaches.Contains(coach))
{
throw new ArgumentException(ExceptionMessages.InvalidId);
}
team.AddCoach(coach);
context.SaveChanges();
}