diesel: Create migrations for users and pastes

Signed-off-by: ATechnoHazard <amolele@gmail.com>

migrations/2020-06-24-164134_create_users/down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS users

migrations/2020-06-24-164134_create_users/up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS users
+(
+    id VARCHAR PRIMARY KEY,
+    username VARCHAR,
+    password VARCHAR,
+    activated BOOLEAN
+)