Go模块-无法访问本地软件包？

So, I'm new to Go. I've created a go.mod file

module github.com/austin/test-project <--- This is all I've added to the go.mod

I added a tag v0.0.1 to my commit latest git commit.

Based on some examples I tried to understand, I added these imports to my go file(s), where common is one package, dynamo is another, and the import is from a third package called main.

import (
"github.com/austin/test-project/common"
"github.com/austin/test-project/db/dynamo/playerstateddb"
"github.com/austin/test-project/db/dynamo/characterstateddb"


"context"
"fmt"
"encoding/json"

"github.com/aws/aws-lambda-go/lambda"
"github.com/aws/aws-lambda-go/events"

And here is my output after running go build ./handler/characterstate where the main go file is:

go: finding github.com/aws/aws-lambda-go/events latest
go: finding github.com/aws/aws-lambda-go/lambda latest
go: finding github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute latest
go: finding github.com/aws/aws-sdk-go/service/dynamodb latest
go: finding github.com/aws/aws-sdk-go/aws latest
go: finding github.com/aws/aws-sdk-go/aws/session latest
go: finding github.com/aws/aws-lambda-go v1.7.0
go: downloading github.com/aws/aws-lambda-go v1.7.0
go: finding github.com/aws/aws-sdk-go/service latest
go: finding github.com/aws/aws-sdk-go v1.15.89
go: downloading github.com/aws/aws-sdk-go v1.15.89
go: finding github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8
go: downloading github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8

The go.mod file is now this:

module github.com/carbonated-dev/madworld-backend

require (
    github.com/aws/aws-lambda-go v1.7.0
    github.com/aws/aws-sdk-go v1.15.89
)

... and I have a characterstate.exe at the root, and the expected go.sum

In my IDE, GoLand, the import paths for my local common and dynamo packages are still highlighted red.

I've been searching all day, and I've got no idea what's going on. Where am I going wrong? Could it be that the git repo is private that I'm trying to

Thanks in advance. Hope to hear from someone soon :)

Simply and outdated IDE. Once updated to a version that supported Go 1.11, I no longer saw the red error text on import.