Newby: undefined function mongo:connect/1 about mongodb-erlang HOT 6 CLOSED

  Erlang/OTP 17 [erts-6.4] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]

  Eshell V6.4  (abort with ^G)
  1> application:start(bson).
  ok
  2> application:start(crypto).                                                                                                       
  ok                                                                                                                                  
  3>  application:start(mongodb).                                                                                                     
  ok                                                                                                                                  
  4> mongo:connect(<<"test">>).                                                                                                       
  {ok,<0.45.0>}

erl -pa ebin/ deps/bson/ebin/
Erlang/OTP 17 [erts-6.4] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V6.4  (abort with ^G)
1> application:start(bson).
ok
2> application:start(crypto).
ok
3> application:start(mongodb).
ok
4> mongo_
mongo_app          mongo_id_server    
4> mongo_
mongo_app          mongo_id_server    
4> mongo_

git clone git://github.com/mongodb/mongodb-erlang.git
Cloning into 'mongodb-erlang'...
remote: Counting objects: 935, done.
remote: Total 935 (delta 0), reused 0 (delta 0), pack-reused 935
Receiving objects: 100% (935/935), 301.88 KiB | 201 KiB/s, done.
Resolving deltas: 100% (499/499), done.
alex@ElementaryElexy~/dev/erlang $  cd mongodb-erlang/
alex@ElementaryElexy~/dev/erlang/mongodb-erlang $  make
WARN:  Expected /home/alex/dev/erlang/mongodb-erlang/deps/bson to be an app dir (containing ebin/*.app), but no .app found.
==> mongodb-erlang (get-deps)
WARN:  Expected /home/alex/dev/erlang/mongodb-erlang/deps/bson to be an app dir (containing ebin/*.app), but no .app found.
Pulling bson from {git,"git://github.com/soundrop/bson-erlang","HEAD"}
Cloning into 'bson'...
==> bson (get-deps)
==> bson (compile)
Compiled src/bson_schema.erl
/home/alex/dev/erlang/mongodb-erlang/deps/bson/src/bson.erl:168: Warning: Non-UTF-8 character(s) detected, but no encoding declared. Encode the file in UTF-8 or add "%% coding: latin-1" at the beginning of the file. Retrying with latin-1 encoding.
Compiled src/bson.erl
Compiled src/bson_binary.erl
==> mongodb-erlang (compile)
Compiled src/main/mongo_app.erl
Compiled src/main/mc_super_sup.erl
Compiled src/connection/mc_worker_logic.erl
Compiled src/api/mongo.erl
Compiled src/connection/mc_connection_man.erl
Compiled src/connection/mc_worker.erl
Compiled src/cursor/mc_cursor_sup.erl
Compiled src/core/mc_action_man.erl
Compiled src/core/mongo_id_server.erl
Compiled src/cursor/mc_cursor.erl
Compiled src/core/mongo_protocol.erl
alex@ElementaryElexy~/dev/erlang/mongodb-erlang $  erl -pa ebin deps/bson/ebin
Erlang/OTP 17 [erts-6.4] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V6.4  (abort with ^G)
1> application:start
start/1       start/2       start_boot/1  start_boot/2  start_type/0  

1> application:start(bson).
ok
2> application:start(mongodb).
ok
3> mongo_ <-- pressed TAB here 
mongo_app          mongo_id_server    
3> mongo_