code: def upgrade():
      """Apply Make connection login/password TEXT"""
      with op.batch_alter_table("connection", schema=None) as batch_op:
          batch_op.alter_column(
              "login",
              existing_type=sa.VARCHAR(length=500),
              type_=sa.Text(),
              existing_nullable=True,
          )
          batch_op.alter_column(
              "password",
              existing_type=sa.VARCHAR(length=5000),
              type_=sa.Text(),
              existing_nullable=True,
          )
  
imports: import sqlalchemy
  from alembic import op
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types