Should be "A user"

"User" does not start with a vowel sound.
Fix typos

plese ->
please
   ^

contacs ->
contact
      ^
Fix a typo

flexiblity ->
flexibility
      ^
Fix a typo

flexiblity ->
flexibility
Fix a typo

documenations ->
documentations
       ^
Fix a typo

contirubte ->
contribute
    ^^^
Fix a typo

developement ->
development
       ^