OIS-14: Added a period at the end of the sentence

src/main/resources/messages_en.properties

@@ -35,7 +35,7 @@ users.passwordReset.notContainNumber=Password must contain at least 1 digit.
 users.passwordReset.containSpaces=Password must not contain spaces.
 
 users.notFound=User does not exist
-users.notFoundByEmail=User with provided email does not exist
+users.notFoundByEmail=User with provided email does not exist.
 
 # Authentication errors
 auth.error.authentication.userCanNotBeFound=User with name {0} can not be found.
@@ -45,4 +45,4 @@ auth.error.authorization.noFollowingPermission=You do not have following permiss
 
 # Pageable size error
 auth.error.pageable.size.null=The page size is not specified
-auth.error.pageable.size.notPositive=The page size should be a positive number
+auth.error.pageable.size.notPositive=The page size should be a positive number