problem with auto-py-to-exe how can i fix it ?

every time i trying to make excutable file by auto-py-to-exe i got wrong message with pip i uninstall many time but the same problem
PS D:\python example> pip install auto-py-to-exe
pip : The term 'pip' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the
spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1

• pip install auto-py-to-exe
• + CategoryInfo : ObjectNotFound: (pip:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundException