typedef struct SilcClientEntryStruct { ... } *SilcClientEntry;

    This structure represents a client or a user in the SILC network.
    The local user has this structure also and it can be accessed from
    SilcClientConnection structure.  All other users in the SILC network
    that are accessed using the Client Library routines will have their
    own SilcClientEntry structure.  For example, when finding users by
    their nickname the Client Library returns this structure back to
    the application.  All strings in the structure are UTF-8 encoded.

    Application may store its own pointer into the context pointer in
    this structure.

    If application wants to store nickname or any of the other strings
    it should always duplicated them.

    None of the string arrays are set if the first character is '\0'.
    All string arrays are always zero ('\0') terminated.

    If application stores the SilcClientEntry it must always take
    a reference of it by calling silc_client_ref_client function.  The
    reference must be released after it is not needed anymore by calling
    silc_client_unref_client function.

    struct SilcClientEntryStruct {
      char nickname[256 + 1];            /* Nickname */
      char username[128 + 1];            /* Username */
      char hostname[256 + 1];            /* Hostname */
      char server  [256 + 1];            /* SILC server name */
      char *realname;                    /* Realname (userinfo) */
      char *nickname_normalized;         /* Normalized nickname */
    
      SilcClientID id;                   /* The Client ID */
      SilcUInt32 mode;                   /* User mode in SILC, see SilcUserMode */
      SilcPublicKey public_key;          /* User's public key, may be NULL */
      SilcHashTable channels;            /* Channels client has joined */
      SilcDList attrs;                   /* Requested Attributes (maybe NULL) */
      unsigned char fingerprint[20];     /* SHA-1 fingerprint of the public key */
    
      void *context;                     /* Application specific context */
      SilcClientEntryInternal internal;
    };