grantRole()
This operation grants a role to a user.
public void grantRole(GrantRoleReq request)
Request Syntax
grantRole(GrantRoleReq.builder()
    .roleName(String roleName)
    .userName(String userName)
    .build()
)
BUILDER METHODS:
- roleName(String roleName)- The name of the role to assign. 
- userName(String userName)- The name of an existing user. 
RETURNS:
void
EXCEPTIONS:
- MilvusClientExceptions - This exception will be raised when any error occurs during this operation. 
Example
GrantRoleReq grantRoleReq = GrantRoleReq.builder()
        .roleName("db_ro")
        .userName("test")
        .build();
client.grantRole(grantRoleReq);