docs: def preprocess(self):
          """Preprocessing.
  
          Removes repeated chars from firstName and lastName fields.
  
          Adds a 'name' field joining all names in to one string.
          """
          super(MambuUser,self).preprocess()
  
          try:
              self['firstName'] = self['firstName'].strip()
          except Exception as e:
              self['firstName'] = ""
          try:
              self['lastName'] = self['lastName'].strip()
          except Exception as ex:
              self['lastName'] = ""
  
          self['name'] = self['firstName'] + " " + self['lastName']