Haks1 commented on issue #7689: Error: no such option: --app
URL: 
https://github.com/apache/incubator-superset/issues/7689#issuecomment-501457460
 
 
   Here the options for create-admin:
   
   ```
   Usage: flask fab create-admin [OPTIONS]
   
     Creates an admin user
   
   Options:
     --username TEXT
     --firstname TEXT
     --lastname TEXT
     --email TEXT
     --password TEXT
     --help            Show this message and exit.
   ```
   
   It's not about the parameters, as the message says, it needs `export 
FLASK_APP=superset` before the `create-admin` to work.
   
   So I did it, but it's still got an other error:
   
   ```
   Traceback (most recent call last):
     File "/usr/local/bin/flask", line 10, in <module>
       sys.exit(main())
     File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 894, in 
main
       cli.main(args=args, prog_name=name)
     File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 557, in 
main
       return super(FlaskGroup, self).main(*args, **kwargs)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 697, in 
main
       rv = self.invoke(ctx)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1066, in 
invoke
       return _process_result(sub_ctx.command.invoke(sub_ctx))
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1064, in 
invoke
       sub_ctx = cmd.make_context(cmd_name, args, parent=ctx)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 621, in 
make_context
       self.parse_args(ctx, args)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 880, in 
parse_args
       value, args = param.handle_parse_result(ctx, opts, args)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1396, in 
handle_parse_result
       value = self.full_process_value(ctx, value)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1680, in 
full_process_value
       return self.prompt_for_value(ctx)
     File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1655, in 
prompt_for_value
       value_proc=lambda x: self.process_value(ctx, x))
     File "/usr/local/lib/python3.6/site-packages/click/termui.py", line 89, in 
prompt
       value = prompt_func(prompt)
     File "/usr/local/lib/python3.6/site-packages/click/termui.py", line 73, in 
prompt_func
       return f('')
   UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc3 in position 4: 
invalid continuation byte
   ```

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