rewrite API, talk to ldap

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

go.mod

@@ -10,14 +10,14 @@ require (
 	github.com/joho/godotenv v1.3.0
 	github.com/micro/cli/v2 v2.1.2
 	github.com/micro/go-micro/v2 v2.6.0
-	github.com/micro/micro/v2 v2.0.1-0.20200210100719-f38a1d8d5348
 	github.com/oklog/run v1.1.0
 	github.com/owncloud/ocis-pkg/v2 v2.2.1
 	github.com/owncloud/ocis-settings v0.0.0-20200522101320-46ea31026363
 	github.com/restic/calens v0.2.0
+	github.com/rs/zerolog v1.17.2
 	github.com/spf13/viper v1.6.3
-	google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84
-	google.golang.org/protobuf v1.22.0
+	google.golang.org/genproto v0.0.0-20200420144010-e5e8543f8aeb
+	gopkg.in/ldap.v2 v2.5.1
 	honnef.co/go/tools v0.0.1-2020.1.0.20200427215036-cd1ad299aeab // indirect
 )