text: """Add username column
  
  Revision ID: 8ee179e4500d
  Revises: 28bd2c824e14
  Create Date: 2018-06-03 22:34:52.889379
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  # revision identifiers, used by Alembic.
  revision = '8ee179e4500d'
  down_revision = '28bd2c824e14'
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.add_column('users',
                    sa.Column('username', sa.String(length=255), nullable=True))
      # ### end Alembic commands ###
  
  
  def downgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.drop_column('users', 'username')
      # ### end Alembic commands ###
  