Add *very* basic login flow

Cargo.lock

@@ -2473,6 +2473,7 @@ dependencies = [
  "thumbhash",
  "tikv-jemallocator",
  "tokio",
+ "toml 1.1.2+spec-1.1.0",
  "tracing",
  "tracing-subscriber",
  "xdg",
@@ -4798,7 +4799,7 @@ dependencies = [
  "regex",
  "serde_json",
  "tar",
- "toml",
+ "toml 0.9.12+spec-1.1.0",
 ]
 
 [[package]]
@@ -5454,6 +5455,21 @@ dependencies = [
  "winnow 0.7.15",
 ]
 
+[[package]]
+name = "toml"
+version = "1.1.2+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81f3d15e84cbcd896376e6730314d59fb5a87f31e4b038454184435cd57defee"
+dependencies = [
+ "indexmap",
+ "serde_core",
+ "serde_spanned",
+ "toml_datetime 1.1.1+spec-1.1.0",
+ "toml_parser",
+ "toml_writer",
+ "winnow 1.0.2",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.7.5+spec-1.1.0"