The view pg_user provides access to information about database users. This is simply a publicly readable view of pg_shadow that blanks out the password field.
Table 44-57. pg_user Columns
|usesysid||int4||User ID (arbitrary number used to reference this user)|
|usecreatedb||bool||User can create databases|
|usesuper||bool||User is a superuser|
|usecatupd||bool||User can update system catalogs. (Even a superuser cannot do this unless this column is true.)|
|passwd||text||Not the password (always reads as ********)|
|valuntil||abstime||Password expiry time (only used for password authentication)|
|useconfig||text||Session defaults for run-time configuration variables|
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