text: CREATE TABLE Customer (
    ID      SERIAL NOT NULL, 
    Name    varchar(255) NOT NULL, 
    Email   varchar(255) NOT NULL, 
    Mobile  varchar(255) NOT NULL, 
    AgentID int4 NOT NULL, 
    PRIMARY KEY (ID));
  CREATE TABLE Agent (
    ID       SERIAL NOT NULL, 
    Name     varchar(255) NOT NULL, 
    Email    varchar(255) NOT NULL, 
    Password varchar(255) NOT NULL, 
    PRIMARY KEY (ID));
  CREATE TABLE AuthToken (
    ID         SERIAL NOT NULL, 
    AgentID    int4 NOT NULL, 
    Selector   varchar(255) NOT NULL, 
    Validator  varchar(255) NOT NULL, 
    Expiration timestamp NOT NULL, 
    Type       int4 NOT NULL, 
    PRIMARY KEY (ID));
  ALTER TABLE Customer ADD CONSTRAINT AgentCustomer FOREIGN KEY (AgentID) REFERENCES Agent (ID);
  ALTER TABLE AuthToken ADD CONSTRAINT AgentToken FOREIGN KEY (AgentID) REFERENCES Agent (ID);
  