Change player auth identifier docs

[tudddorrr]

No description provided.

[claude]

Overall this is a clean, well-structured PR. The new sections are consistent with existing patterns, and the error documentation additions (IDENTIFIER_TAKEN expansion, NEW_IDENTIFIER_MATCHES_CURRENT_IDENTIFIER) are accurate and well-formed.

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✅ Accuracy & Completeness

No issues found. The new change_identifier() / ChangeIdentifier() function references are consistent with the existing change_email() / ChangeEmail() pattern.

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🟡 Clarity & Readability

INVALID_CREDENTIALS description introduces ambiguous sentence structure.

The revised sentence reads:

"This error also occurs when changing a player password, email address, or identifier, or when toggling verification and the current password entered is incorrect."

The addition of "or when" before "toggling verification" creates a list of two parallel conditions:

1. When changing a password, email, or identifier (no qualifier)
2. When toggling verification and the current password is incorrect

This implies the wrong-password condition only applies to toggling verification, not to the other three operations — which contradicts how the error actually works.

Suggested rewrite:

"This error also occurs when an incorrect current password is provided while changing a player's password, email address, or identifier, or when toggling verification."

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💻 Code Examples

The new "Changing a player's identifier" sections in both Godot and Unity follow the same minimal one-liner pattern as the adjacent "Changing a player's email" sections (no code example), so this is consistent with existing style. Worth noting that both sections could benefit from a code snippet in a future pass, but that's out of scope for this PR.

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📖 Structure, 🔗 Links, ⚡ Developer Experience

No issues found.