Asturias-sam commented on issue #2148:
URL: 
https://github.com/apache/incubator-superset/issues/2148#issuecomment-714328415


   what SQLAlchemy URI have you guys used for presto to Impersonate the logged 
on user.
   Currently only the user who have configured the datasource is able to query 
for other it's shows
   ```
   sqlalchemy.exc.OperationalError: (pyhive.exc.OperationalError) Unexpected 
status code 401
   b'Access Denied: Invalid credentials'
   [SQL: SHOW SCHEMAS]
   (Background on this error at: http://sqlalche.me/e/e3q8)
   ```
   From Presto side:
   `Password validation failed for user DN [[email protected]]: 
[LDAP: error code 49 - 80090308: LdapErr: DSID-0C090453, comment: 
AcceptSecurityContext error, data 52e, v3839]` ?


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