API & Client: add user langage preferences in database

fittrackee_api/migrations/versions/27425324c9e3_.py

@@ -1,4 +1,4 @@
-"""add weekm in 'User' table
+"""add 'weekm' in 'User' table
 
 Revision ID: 27425324c9e3
 Revises: 096dd0b43beb

fittrackee_api/migrations/versions/f69f1e413bde_.py

@@ -0,0 +1,28 @@
+"""add 'language' to 'User' table
+
+Revision ID: f69f1e413bde
+Revises: 27425324c9e3
+Create Date: 2019-09-16 13:18:39.198777
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'f69f1e413bde'
+down_revision = '27425324c9e3'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('language', sa.String(length=50), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'language')
+    # ### end Alembic commands ###