Error after adding database

[Telbots]

ive added my own database to the config and it connects all fine but now I have no idea how to populate the database.

TypeError: /home/telbots/Documents/Projects/reddit-clone/views/front/front.ejs:14
12| <%- include(../partials/sidebar_index_actions) %>
13| <%- include(../partials/sidebar_index_subscribed, {isAuth, subscribed}) %>

14| <%- include(../partials/sidebar_index_subreddits, {subreddits}) %>
15|
16|
17|

/home/telbots/Documents/Projects/reddit-clone/views/partials/sidebar_index_subreddits.ejs:1

1|

Subbeddits (<%=subreddits.length %>)

2|
3|
4| <% if (subreddits != undefined) {

Cannot read property length of undefined
at eval (eval at compile (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:618:12), :10:36)
at returnedFn (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:653:17)
at include (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:651:39)
at eval (eval at compile (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:618:12), :29:17)
at returnedFn (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:653:17)
at tryHandleCache (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:251:36)
at View.exports.renderFile [as engine] (/home/telbots/Documents/Projects/reddit-clone/node_modules/ejs/lib/ejs.js:482:10)
at View.render (/home/telbots/Documents/Projects/reddit-clone/node_modules/express/lib/view.js:135:8)
at tryRender (/home/telbots/Documents/Projects/reddit-clone/node_modules/express/lib/application.js:640:10)
at Function.render (/home/telbots/Documents/Projects/reddit-clone/node_modules/express/lib/application.js:592:3)
at ServerResponse.render (/home/telbots/Documents/Projects/reddit-clone/node_modules/express/lib/response.js:1008:7)
at /home/telbots/Documents/Projects/reddit-clone/controllers/front_controller.js:68:25
at /home/telbots/Documents/Projects/reddit-clone/node_modules/mongoose/lib/model.js:4475:16
at (anonymous function).call (/home/telbots/Documents/Projects/reddit-clone/node_modules/mongoose/lib/query.js:3658:7)
at cb (/home/telbots/Documents/Projects/reddit-clone/node_modules/mongoose/lib/query.js:1688:14)
at result (/home/telbots/Documents/Projects/reddit-clone/node_modules/mongodb/lib/utils.js:414:17)