Change 'an user' to 'a user' (influxdata#332)

Author: wwentland

influxdb/client.py

@@ -671,7 +671,7 @@ def create_user(self, username, password, admin=False):
  self.query(text)
 
  def drop_user(self, username):
- """Drop an user from InfluxDB.
+ """Drop a user from InfluxDB.
 
  :param username: the username to drop
  :type username: str
@@ -713,7 +713,7 @@ def delete_series(self, database=None, measurement=None, tags=None):
  self.query(query_str, database=database)
 
  def revoke_admin_privileges(self, username):
- """Revoke cluster administration privileges from an user.
+ """Revoke cluster administration privileges from a user.
 
  :param username: the username to revoke privileges from
  :type username: str
@@ -725,7 +725,7 @@ def revoke_admin_privileges(self, username):
  self.query(text)
 
  def grant_privilege(self, privilege, database, username):
- """Grant a privilege on a database to an user.
+ """Grant a privilege on a database to a user.
 
  :param privilege: the privilege to grant, one of 'read', 'write'
  or 'all'. The string is case-insensitive
@@ -741,7 +741,7 @@ def grant_privilege(self, privilege, database, username):
  self.query(text)
 
  def revoke_privilege(self, privilege, database, username):
- """Revoke a privilege on a database from an user.
+ """Revoke a privilege on a database from a user.
 
  :param privilege: the privilege to revoke, one of 'read', 'write'
  or 'all'. The string is case-insensitive