Add actix_session package

Cargo.toml

@@ -30,6 +30,7 @@ lazy_static = { version = "1.4.0", optional = true }
 serde = { versions = "1.0.195", features = ["derive"] }
 openssl = { version = "0.10.63", optional = true }
 actix-identity = { version = "0.7.0", optional = true }
+actix-session = { version = "0.9.0", features = ["redis-rs-session"], optional = true }
 
 [features]
 csr = ["leptos/csr", "leptos_meta/csr", "leptos_router/csr"]
@@ -46,6 +47,7 @@ ssr = [
   "lazy_static",
   "openssl",
   "actix-identity",
+  "actix-session",
 ]
 
 # Defines a size-optimized profile for the WASM bundle in release mode