Add banning

Fixes #13

migrations/versions/ea5a023711e0_.py

@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: ea5a023711e0
+Revises: fa12fadbdb40
+Create Date: 2018-05-26 01:55:09.745881
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'ea5a023711e0'
+down_revision = 'fa12fadbdb40'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    conn = op.get_bind()
+    conn.execute("ALTER TYPE userrank ADD VALUE 'BANNED'")
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###