VARCHAR requires a length on dialect mysql

Hi,

Hey, first of all: Congrats for this awesome project!!!

Now, my issue:

I´m trying to install Taguette using "Native" installation on a server using MariaDB and under a Venv in a Debian server.

When I first try to run Taguette I get this error:

Thanks in advance

  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/dialects/mysql/base.py", line 2407, in visit_VARCHAR
    "VARCHAR requires a length on dialect %s" % self.dialect.name
sqlalchemy.exc.CompileError: VARCHAR requires a length on dialect mysql

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/var/www/html/taguette/bin/taguette", line 8, in <module>
    sys.exit(main())
  File "/var/www/html/taguette/lib/python3.7/site-packages/taguette/main.py", line 324, in main
    app = make_app(config, debug=args.debug)
  File "/var/www/html/taguette/lib/python3.7/site-packages/taguette/web/__init__.py", line 138, in make_app
    default_handler_args={"status_code": 404},
  File "/var/www/html/taguette/lib/python3.7/site-packages/taguette/web/base.py", line 41, in __init__
    self.DBSession = database.connect(config['DATABASE'])
  File "/var/www/html/taguette/lib/python3.7/site-packages/taguette/database.py", line 559, in connect
    Base.metadata.create_all(bind=engine)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/schema.py", line 4745, in create_all
    ddl.SchemaGenerator, self, checkfirst=checkfirst, tables=tables
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 3079, in _run_ddl_visitor
    conn._run_ddl_visitor(visitorcallable, element, **kwargs)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2081, in _run_ddl_visitor
    visitorcallable(self.dialect, self, **kwargs).traverse_single(element)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/visitors.py", line 485, in traverse_single
    return meth(obj, **kw)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/ddl.py", line 850, in visit_metadata
    _is_metadata_operation=True,
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/visitors.py", line 485, in traverse_single
    return meth(obj, **kw)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/ddl.py", line 895, in visit_table
    include_foreign_key_constraints,  # noqa
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1262, in execute
    return meth(self, multiparams, params, _EMPTY_EXECUTION_OPTS)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/ddl.py", line 78, in _execute_on_connection
    self, multiparams, params, execution_options
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1350, in _execute_ddl
    dialect=dialect, schema_translate_map=schema_translate_map
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 522, in compile
    return self._compiler(dialect, **kw)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/ddl.py", line 29, in _compiler
    return dialect.ddl_compiler(dialect, self, **kw)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/compiler.py", line 455, in __init__
    self.string = self.process(self.statement, **compile_kwargs)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/compiler.py", line 490, in process
    return obj._compiler_dispatch(self, **kwargs)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/visitors.py", line 81, in _compiler_dispatch
    return meth(self, **kw)
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/sql/compiler.py", line 4039, in visit_create_table
    from_=ce,
  File "/var/www/html/taguette/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 211, in raise_
    raise exception
sqlalchemy.exc.CompileError: (in table 'users', column 'login'): VARCHAR requires a length on dialect mysql