Your MONGODB_URI should look somewhat like this:
mongodb://heroku_3vf5zhlq:[email protected]:41218/heroku_3vf5zhlqwhere this is the pattern:
mongodb://user:pass@host:port/dbThis being said, these are the parts we need:
user: heroku_3vf5zhlq
pass: gjavjbqb119nu1e12l1481je5
host: ds141218.mlab.com
port: 41218
db: heroku_3vf5zhlqNow try to put them together in this format:
mongo host:port/db -u user -p pass yourSeeds.jsand run this in your terminal.