code: def upgrade():
      
      op.create_table(
          'oauthclient_remoteaccount',
          sa.Column('id', sa.Integer(), nullable=False),
          sa.Column('user_id', sa.Integer(), nullable=False),
          sa.Column('client_id', sa.String(length=255), nullable=False),
          sa.Column(
              'extra_data',
              sqlalchemy_utils.JSONType(),
              nullable=False),
          sa.ForeignKeyConstraint(['user_id'], [u'accounts_user.id'], ),
          sa.PrimaryKeyConstraint('id'),
          sa.UniqueConstraint('user_id', 'client_id')
      )
      op.create_table(
          'oauthclient_useridentity',
          sa.Column('id', sa.String(length=255), nullable=False),
          sa.Column('method', sa.String(length=255), nullable=False),
          sa.Column('id_user', sa.Integer(), nullable=False),
          sa.ForeignKeyConstraint(['id_user'], [u'accounts_user.id'], ),
          sa.PrimaryKeyConstraint('id', 'method')
      )
      op.create_index(
          'useridentity_id_user_method', 'oauthclient_useridentity',
          ['id_user', 'method'], unique=True
      )
      op.create_table(
          'oauthclient_remotetoken',
          sa.Column('id_remote_account', sa.Integer(), nullable=False),
          sa.Column('token_type', sa.String(length=40), nullable=False),
          sa.Column(
              'access_token',
              sqlalchemy_utils.EncryptedType(),
              nullable=False),
          sa.Column('secret', sa.Text(), nullable=False),
          sa.ForeignKeyConstraint(
              ['id_remote_account'], [u'oauthclient_remoteaccount.id'],
              name='fk_oauthclient_remote_token_remote_account'
          ),
          sa.PrimaryKeyConstraint('id_remote_account', 'token_type')
      )
docs: Upgrade database.