Use id in uri instead of username

src/remote/activitypub/renderer/follow.ts

@@ -3,6 +3,6 @@ import { IRemoteUser, ILocalUser } from '../../../models/user';
 
 export default (follower: ILocalUser, followee: IRemoteUser) => ({
 	type: 'Follow',
-	actor: `${config.url}/@${follower.username}`,
+	actor: `${config.url}/users/${follower._id}`,
 	object: followee.uri
 });

src/remote/activitypub/renderer/key.ts

@@ -3,8 +3,8 @@ import { extractPublic } from '../../../crypto_key';
 import { ILocalUser } from '../../../models/user';
 
 export default (user: ILocalUser) => ({
-	id: `${config.url}/@${user.username}/publickey`,
+	id: `${config.url}/users/${user._id}/publickey`,
 	type: 'Key',
-	owner: `${config.url}/@${user.username}`,
+	owner: `${config.url}/users/${user._id}`,
 	publicKeyPem: extractPublic(user.keypair)
 });

src/remote/activitypub/renderer/like.ts

@@ -1,10 +1,8 @@
 import config from '../../../config';
 import { ILocalUser } from '../../../models/user';
 
-export default (user: ILocalUser, note) => {
-	return {
-		type: 'Like',
-		actor: `${config.url}/@${user.username}`,
-		object: note.uri ? note.uri : `${config.url}/notes/${note._id}`
-	};
-};
+export default (user: ILocalUser, note) => ({
+	type: 'Like',
+	actor: `${config.url}/users/${user._id}`,
+	object: note.uri ? note.uri : `${config.url}/notes/${note._id}`
+});

src/remote/activitypub/renderer/note.ts

@@ -34,7 +34,7 @@ export default async (note: INote) => {
 		_id: note.userId
 	});
 
-	const attributedTo = `${config.url}/@${user.username}`;
+	const attributedTo = `${config.url}/users/${user._id}`;
 
 	return {
 		id: `${config.url}/notes/${note._id}`,

src/remote/activitypub/renderer/person.ts

@@ -3,7 +3,7 @@ import renderKey from './key';
 import config from '../../../config';
 
 export default user => {
-	const id = `${config.url}/@${user.username}`;
+	const id = `${config.url}/users/${user._id}`;
 
 	return {
 		type: 'Person',