kw auth

ClusterClause = "seeds" Expr | "port" IntLit | "trace_sample" FloatLit | "auth" Block | "defaults" "{" { Ident Expr } "}"
            | "role" Ident "{" RoleClause { ( ";" | NL ) RoleClause } "}"
            | "assign" "by" Expr { "else" Expr } ;

use std.time { Duration, now }
use std.http.{Client as Http}
use self.billing { charge }      // a module of one's own package
use super.common { Money }       // the parent module
use auth.tokens { verify }       // a dependency from oxl.toml
use parsers { <|> }              // importing an operator
use std.coll.*                   // all pub names (a warning in libraries)