AWS RDS role: rds superuser

The rds_superuser role is the most highly privileged role.

To grant rds_superuser to a user user:

GRANT rds_superuser TO "your_username";
GRANT ROLE 

Related

• superuser role
• aws rds modify-db-instance --master-user-password
• master

See also

• GRANT, \ddp, GRANT USAGE, GRANT ALL PRIVILEGES, GRANT SELECT, View GRANTs on Redshift, has_table_privilege, has_schema_privilege, HAS_DATABASE_PRIVILEGE, SCHEMA, Privileges, GRANT EXECUTE
• PostgreSQL: Database roles, CREATE USER, CREATE ROLE, \du, \du+, create user, Alter user
• Amazon databases: AWS RDS, storage, aws rds, Amazon RDS Proxy, RDS FAQs, PostgreSQL, MySQL, SQL Server, AWS Outposts, Amazon Aurora, Amazon Aurora Serverless , Amazon DocumentDB, Amazon DynamoDB, Amazon Redshift, Amazon QLDB, Amazon RDS Performance Insights, DataFileRead, DMS, Amazon Neptune, Amazon MemoryDB for Redis, Amazon RDS query editor for Aurora Serverless, Amazon Redshift query editor, AWS RDS Snapshots, AWS RDS Instance Types, rds_superuser, Authentication, autoscaling

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html