[oauth] start oauth auth_code server implementation

server/api/models/oauth_code.js

@@ -0,0 +1,18 @@
+
+module.exports = (sequelize, DataTypes) => {
+  const OAuthCode = sequelize.define('oauth_code', {
+    authorizationCode: {
+      type: DataTypes.STRING,
+      primaryKey: true
+    },
+    scope: DataTypes.STRING,
+    redirect_uri: DataTypes.STRING
+  }, {})
+
+  OAuthCode.associate = function (models) {
+    OAuthCode.belongsTo(models.user)
+    OAuthCode.belongsTo(models.oauth_client)
+  }
+
+  return OAuthCode
+}