public void GetUserName_MethodShouldReturnNameFromEmailAdres() {
			//Arrange
			var email = "*****@*****.**";
			var user = new ApplicationUser { UserName = email };
			
			var expectedResult = "marcin.szyszka";

			//Act
			var result = user.GetUserName();

			//Assert
			Assert.Equal(expectedResult, result);
		}
		public void GetUserName_MethodShouldReturnFullName_WhenNameIsNotEmail()
		{
			//Arrange
			var name = "marcin.szyszka123";
			var user = new ApplicationUser { UserName = name };

			var expectedResult = "marcin.szyszka123";

			//Act
			var result = user.GetUserName();

			//Assert
			Assert.Equal(expectedResult, result);
		}