Error 1 Cannot use local variable 'username' before it is declared. The declaration of the local variable hides the field 'Senior_project._Default.username'.
Error 2 Cannot use local variable 'password' before it is declared. The declaration of the local variable hides the field 'Senior_project._Default.password'.
Error 3 The name 'Position_id' does not exist in the current context
Error 4 Operator '==' cannot be applied to operands of type 'object' and 'int'