Implemented a possible bugfix

ref #68

src/models/entities/Participant.ts

@@ -10,6 +10,7 @@ import {
 import { Column, Entity, ManyToOne, PrimaryGeneratedColumn, TableInheritance } from "typeorm";
 import { config } from '../../config';
 import { Address } from "./Address";
+import { IAddressUser } from './IAddressUser';
 
 /**
  * Defines the Participant entity.
@@ -17,7 +18,7 @@ import { Address } from "./Address";
 */
 @Entity()
 @TableInheritance({ column: { name: "type", type: "varchar" } })
-export abstract class Participant {
+export abstract class Participant implements IAddressUser {
   /**
    * Autogenerated unique id (primary key).
    */
@@ -53,7 +54,7 @@ export abstract class Participant {
    * The participant's address.
    * This is a address object to prevent any formatting differences.
    */
-  @ManyToOne(() => Address, address => address.participants, { nullable: true })
+  @ManyToOne(() => Address, address => address.addressUsers, { nullable: true })
   address?: Address;
 
   /**