Fix header auth, could not configure AuthHeaderEmailHeader

[Kaffeetasse]

Description

This PR fixes the bug regarding the Header Authentication AuthHeaderEmailHeader, as it was not possible to configure a Header name.

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore (Release)
• ⏩ Revert

Related Tickets & Documents

Screenshots/Recordings

Steps to QA

• Configure Header Authentication for example:

AUTH_METHOD: "header"
AUTH_HEADER_USERNAME_HEADER: "x-token-user-name"
AUTH_HEADER_EMAIL_HEADER: "x-token-user-email"

• Now a User can login but the E-Mail field will be empty.

[StevenWeathers]

Please run goimports -w . to fix the go formatting so the build lint step will pass.

[Kaffeetasse]

@StevenWeathers sorry I did not think that this will be an issue, should now be fixed.