The Dashboard allows you to add RateLimits in 4 places, and doing so is trivially easy: 
new DBD.Dashboard({
  rateLimits: {
    manage: RateLimitSettingsObject,
    guildPage: RateLimitSettingsObject,
    settingsUpdatePostAPI: RateLimitSettingsObject,
    discordOAuth2: RateLimitSettingsObject,
  },
});

​
Example Usage

new DBD.Dashboard({
  rateLimits: {
    manage: {
      windowMs: 15 * 60 * 1000, // 15 minutes
      max: 100, // Limit each IP to 100 requests per `window` (here, per 15 minutes)
      message: "Sorry, you are ratelimited!", // Message returned if user should be rate limited, could be also JSON/HTML
      store: null, // <Rate Limiter Store> - if null, new MemoryStore()
      // supported stores: https://www.npmjs.com/package/express-rate-limit#store
    },
  },
});
​
manage
RateLimitSettingsObject
required
Manage Guilde Page Rate Limits Object
​
guildPage
RateLimitSettingsObject
required
Guild Page Rate Limits Object
​
settingsUpdatePostAPI
RateLimitSettingsObject
required
Settings Update Post API Rate Limits Object
​
discordOAuth2
RateLimitSettingsObject
required
Discord OAuth2 Rate Limits Object
​
RateLimitSettingsObject
Object