Could bgp password include double quotation character "?

Hi All, How could I include double quotation in bgp password? in my config file protocol bgp AS_64496 from ABC { description "BIRD BGP instance AS_64496"; multihop; neighbor x.y.z.3 as 65002; source address a.b.c.29; # What local address we use for the TCP connect password "a1s@"xyz"; import all; export where proto = "static_bgp"; } password "a1s@"xyz"; I tried to use \ to escape or use single quotation for password, the bird will give me this error /opt/bird/etc/bird.conf, line 30: syntax error What is the restriction on password? Thanks -Eugene