Cannot find package github.com/pingcap/tidb

I am following the official website.
i add a configuration:

mkdir -p .idea/runConfigurations/ && cd .idea/runConfigurations/

cat <<EOF > unistore_4000.xml
<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="unistore 4000" type="GoApplicationRunConfiguration" factoryName="Go Application">
    <module name="tidb" />
    <working_directory value="\$PROJECT_DIR\$" />
    <kind value="PACKAGE" />
    <filePath value="\$PROJECT_DIR\$" />
    <package value="github.com/pingcap/tidb/tidb-server" />
    <directory value="\$PROJECT_DIR\$" />
    <method v="2" />
  </configuration>
</component>
EOF

cat <<EOF > playground_attach_4001.xml
<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="playground attach 4001" type="GoApplicationRunConfiguration" factoryName="Go Application">
    <module name="tidb" />
    <working_directory value="\$PROJECT_DIR\$" />
    <parameters value="--path=127.0.0.1:2379 --store=tikv --status=10081 -P 4001 " />
    <kind value="PACKAGE" />
    <filePath value="\$PROJECT_DIR\$/tidb-server/main.go" />
    <package value="github.com/pingcap/tidb/tidb-server" />
    <directory value="\$PROJECT_DIR\$" />
    <method v="2" />
  </configuration>
</component>
EOF

cat <<EOF > unit_test.xml
<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="unit test" type="GoTestRunConfiguration" factoryName="Go Test">
    <module name="tidb" />
    <working_directory value="\$PROJECT_DIR\$" />
    <go_parameters value="-race -i --tags=intest,deadlock" />
    <framework value="gocheck" />
    <kind value="DIRECTORY" />
    <package value="github.com/pingcap/tidb" />
    <directory value="\$PROJECT_DIR\$/planner/core" />
    <filePath value="\$PROJECT_DIR\$" />
    <pattern value="TestEnforceMPP" />
    <method v="2" />
  </configuration>
</component>
EOF

but my goland look like :
image
it occured :
Error: Cannot find package github.com/pingcap/tidb/tidb-server

I’m not sure what’s happening, I tried looking in the go.mod and didn’t find the mod in question, is the documentation wrong?

It is “github.com/pingcap/tidb/cmd/tidb-server”.