Clean-up motherduck auth.

.gitignore

@@ -3,3 +3,5 @@ __pycache__/
 service_account.json
 ee_service_account.json
 md_service_token.txt
+.env
+.vscode

app.py

@@ -171,15 +171,12 @@ class IndexGenerator:
  return df
 
 def set_up_duckdb(service_token_file=None):
- print('setting up duckdb')
+ print('set up duckdb')
  # use `climatebase` db
- if service_token_file is not None:
- with open(service_token_file, 'r') as f:
- md_service_token=f.read()
- 
- os.environ['motherduck_token'] = md_service_token
- con = duckdb.connect('md:climatebase')
+ if not os.getenv('motherduck_token');
+ raise Exception('No motherduck token found. Please set the `motherduck_token` environment variable.')
  else:
+ con = duckdb.connect('md:climatebase')
  con = duckdb.connect(':climatebase:')
  con.sql("USE climatebase;")