diff --git a/backend/alembic/versions/eee1d35c9b88_add_email_last_login_at_login_count_to_.py b/backend/alembic/versions/eee1d35c9b88_add_email_last_login_at_login_count_to_.py
new file mode 100644
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+++ b/backend/alembic/versions/eee1d35c9b88_add_email_last_login_at_login_count_to_.py
@@ -0,0 +1,48 @@
+"""add email last_login_at login_count to users
+
+Revision ID: eee1d35c9b88
+Revises: 005
+Create Date: 2026-05-14 16:53:20.614892
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision: str = 'eee1d35c9b88'
+down_revision: Union[str, None] = '005'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('system_configs',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('key', sa.String(length=100), nullable=False),
+    sa.Column('value', postgresql.JSONB(astext_type=sa.Text()), nullable=False),
+    sa.Column('description', sa.Text(), nullable=True),
+    sa.Column('updated_at', sa.DateTime(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_system_configs_key'), 'system_configs', ['key'], unique=True)
+    op.drop_index('ix_preference_analyses_user_id', table_name='preference_analyses')
+    op.create_index(op.f('ix_preference_analyses_user_id'), 'preference_analyses', ['user_id'], unique=True)
+    op.add_column('users', sa.Column('email', sa.String(length=255), nullable=True))
+    op.add_column('users', sa.Column('last_login_at', sa.DateTime(), nullable=True))
+    op.add_column('users', sa.Column('login_count', sa.Integer(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'login_count')
+    op.drop_column('users', 'last_login_at')
+    op.drop_column('users', 'email')
+    op.drop_index(op.f('ix_preference_analyses_user_id'), table_name='preference_analyses')
+    op.create_index('ix_preference_analyses_user_id', 'preference_analyses', ['user_id'], unique=False)
+    op.drop_index(op.f('ix_system_configs_key'), table_name='system_configs')
+    op.drop_table('system_configs')
+    # ### end Alembic commands ###
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