{
    "sessions_login" : {
        "type" : "form", 
        "name" : "login", 
        "submit" : "login@sessions", 
        "structure" : [
            ["username", "text", {"required" : true, "minimum_length" : 1, "maximum_length" : 32, "pattern" : "^[a-zA-Z_][a-zA-Z0-9_]{0,31}$"}], 
            ["password", "password", {"required" : true, "minimum_length" : 1, "maximum_length" : 32}]
        ]
    }, 
    "sessions_logout" : {
        "type" : "form", 
        "name" : "logout", 
        "submit" : "logout@sessions", 
        "structure" : []
    }, 
    "sessions_register" : {
        "type" : "form", 
        "name" : "register", 
        "submit" : "register@sessions", 
        "structure" : [
            ["username", "text", {"required" : true, "minimum_length" : 1, "maximum_length" : 32, "pattern" : "^[a-zA-Z_][a-zA-Z0-9_]{0,31}$"}], 
            ["password", "password", {"required" : true, "minimum_length" : 1, "maximum_length" : 32}], 
            ["confirm_password", "password", {"required" : true, "minimum_length" : 1, "maximum_length" : 32}], 
            ["email", "email", {"required" : true}]
        ]
    }
}